The Megastar turned 53 on Sunday, January 6, and opted for no big celebrations of any kind. Her kids, however, would not let the day pass without making her feel special. "My kids saved my birthday this year," Sharon wrote on Instagram.

Frankie gifted her mom Sharon with her favorite notebook, made tacos for dinner, and wrote her "incomparable beautiful mama" a touching, heartfelt letter. In her own words, she paid tribute to Sharon's love, strength, and resilience, and expressed gratitude for everything she's done for her and her siblings.

"Of all the things you've taught me, it is from you that I learned how to love and how to allow myself to feel everything through the heart," Frankie wrote. "This genuine desire to love wholly, truthfully, and generously is what fuels my every breath. It's what keeps me alive!"

The 18-year-old lauded her mom's strength and the "neverending fire" in her spirit after having endured "so much pain and so much trouble."

"Your resilience and your constant brilliance leave me beyond awestruck every time," Frankie said. "You deserve every ounce, every sliver of pure happiness, joy, and security that this world can muster—because God knows you have been exactly that to more people than I could ever name."

Frankie then expressed how grateful she is to have Sharon as her mom. "Thank you for encouraging me to be my own person. Thank you for always, always having my back," she said, professing her love and faith in her mom. "Keep your head up high, but know that I'll always be right here looking up at you, cheering you on," Frankie wrote.

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Meanwhile, Sharon's other children—adopted son Miguel, youngest daughter Miel, and firstborn KC Concepcion, who's back from France—also gave her simple gifts and letters. Miguel wrote her a simple greeting in his own handwriting. Miel painted a portrait of Sharon's crush from K-Pop band NCT. KC gave her mom her favorite liquid soaps from France, and a label maker, which Sharon was so excited to receive.

In her letter, 14-year-old Miel thanked her mom for being always present, supporting her, and guiding and inspiring her to never give up and to always strive to be her best self. "You teach me to become a better person and always help and support me with my passions," Miel wrote. "I am happy you're my mom," she added.

Miel also appreciated Sharon for all her efforts, such as getting into K-pop so they could have something in common, and for encouraging her and her siblings to follow their dreams. "Thank you for being the best mom ever!" she wrote.

"I love the woman you are deep inside," KC wrote in her letter. "You are the original It Girl and more! My one and only 'Miss Universe' and first Valentine... Oh, how I miss and love you!" she added. "In case you forget what happiness is like, and what kind of beautiful person you are, hopefully, you discover that we are all here to remind you."

Sharon wrote in Instagram, "I feel blessed to have my children and am so proud of how they have grown up to be good human beings." Indeed, that's the best gift anyone can give their mom.